TSB NUMBER: 02-20-01

TSB ISSUE DATE

06/02/2020

BULLETIN NOTES

APPLICABLE MODELS / VINS
2019 Mazda2 (Mexico Built) vehicles with VINs in between 3MD DJ**** ** 307899 – 317142 (produced from Sep. 1, 2018 to Jul. 22, 2019)
2017 – 2018 Mazda3 (Japan Built) vehicles with VINs in between JM1 BN **** ** 191040 – 199538 (produced from May 7, 2018 to Oct. 27, 2018)
2018 Mazda3 (Mexico Built) vehicles with VINs in between 3MZ BN **** ** 255004 – 277187 (produced from Sep. 1, 2018 to Dec. 19, 2018)
2019 – 2020 MAZDA3 (Japan Built) vehicles with VINs lower than JM1 BP **** ** 150579 (produced before Aug. 1 , 2019)
2019 – 2020 MAZDA3 (Mexico Built) vehicles
2018 Mazda6 vehicles with VINs in between JM1 GL**** ** 316373 – 333577 (produced from May 7, 2018 to Dec. 1, 2018)
2019 CX-3 vehicles with VINs in between JM1 DK**** ** 406295 – 441849 (produced from May 7, 2018 to Apr. 1, 2019)
2018 – 2019 CX-5 vehicles with VINs in between JM3 KF**** ** 404441 – 542054 (produced from May 7, 2018 to Dec. 1, 2018)
2018 – 2019 CX-9 vehicles with VINs in between JM3 TC**** ** 231724 – 314070 (produced from May 7, 2018 to Dec. 1, 2018)
2018 – 2019 MX-5 vehicles with VINs in between JM1 ND**** ** 206203 – 308245 (produced from May 7, 2018 to Apr. 1, 2019)
2018 – 2019 MX-5 30th anniversay edition vehcles wtih VINs from JM1 ND**** ** 400001.

DESCRIPTION

Some vehicles may exhibit corrosion of the wheel nuts. This is caused by torsional stress concentrating on the tip of the wheel nut because of the thin and long shape of the nut, which damages the coating and causes the corrosion. To correct this issue, the width across the flats of the wheel nuts have been changed from 17mm to 21mm.

NOTE: This concern only occurs to vehicles with a wheel nut of 17mm width across the flats.

• On May 1, 2018, Japan produced vehicles starting using 17 mm hex lug nuts instead of 21 mm on the same size thread.
• On December 3, 2018, there was a switch from 17 mm lug nuts back to 21 mm lug nuts for Mazda6, CX-5 and CX-9 vehicles with the VINS listed below.

• On April 1, 2019, there was a switch from 17 mm lug nuts back to 21 mm lug nuts for CX-3 and MX-5 vehicles with the VINS listed below.

REPAIR PROCEDURE

1. Verify customer concern.
2. Replace the wheel nuts with new 21 mm nuts and replace the wheel nut wrench with a modified one according to the instructions on MGSS (WHEEL AND TIRE REMOVAL/INSTALLATION).
NOTE:

• For Mazda3 5 door HB with Bose audio, replace the 17 mm spare tire bolt with a 21 mm spare tire bolt.
• If the vehicle is equipped with 17 mm wheel lock set, replace it with a 21 mm wheel lock set and save the 17 mm wheel lock set as it may be collected in the future for inspection.

3. Verify repair.

PARTS INFORMATION

NOTE: Select the corresponding parts according to the GEPC.

WARRANTY INFORMATION

NOTE:

• This warranty information applies only to verified customer complaints on vehicles eligible for warranty repair.
• This repair will be covered under Mazda’s New Vehicle Limited Warranty term.
• Additional diagnostic time cannot be claimed for this repair.

NOTE:

• Claim wheel nut wrench (Qty=1) as a related part.
• Claim the accessory wheel lock kit 000088120DBP (21 mm hex) as a related part (if the vehicle is equipped with a 17 mm wheel lock set) and save the 17 mm wheel lock set as it may be collected in the future for inspection.